Self-righting lamp.



L. A. BARTLETT.

SELF RIGHTING LAMP.

APPLIOATION FILE-B00131, 1911.

11,023,062. Patented Apr.9,1912.

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coLunmlA PLANOGRAPH CO7. WASHINGTON, Iv c.

LOWELL ARTHUR BARTLETT, OF DANVILLE, VERMONT.

SELF-RIGI-ITING LAMP.

Specification of Letters Patent.

Application filed October 31, 1911.

Patented Apr. 9, 1912.

Serial No. 657,796.

To all whom it may concern.

Be it known that I, LOWELL A. BARTLETT, a citizen of the United States,residing at Danville, in the'county of Caledonia and State of Vermont,have invented new and useful Improvements in Self-Righting Lamps, ofwhich the following is a specification. 1

This invention relates to lamps and more particularly to that type whichis known in the art as self righting lamps.

The object of the invention is to provide a device of this characterwhich is simple, inexpensive, and which when tilted or knocked over,will automatically right itself and thereby prevent explosions.

A further object of the invention is to provide a lamp of this characterhaving a body independent of the tank so that it may be readily removedtherefrom with the chimney support or burner and which coacts with thetank to form a substantially semispheroidal body.

Further objects of the invention will appear as the following specificdescription is read in connection with the accompanying drawings whichform a part of this application, and in which Figure 1 is a sideelevation. Fig. 2 is a vertical sectional view therethrough.

Referring more particularly to the drawings, 1 represents the tank whichhas the lower portion of its sides 2 constructed in the form of asemi-sphere with the end or bottom slightly flattened as shown at 3 andprovided with a longitudinal wei ht 1. The upper half of the sidesgraduaTly merges into a neck 5 which has secured upon its upper endsdiametrically opposite projections or lugs 6. These lugs are adapted toengage a bayonet slot 7 formed in the neck 8 of the body 9. This neck issubstantially U-shaped in cross section so as to overhang the neck 5 andis provided on its inner surface with screw threads 10 adapted toreceive the attaching nipple carried by the burner 12. The body 9 is aninverted cup shape structure and its sides conform to the curvature ofthe sides 2 so that a semispheroidal structure is produced when theCopies of this patent may be obtained for body is applied to the tank asshown in Figs. 1 and 2. The body is removably mounted upon the tank bymeans of the studs and bayonet slot 6 and 7 so that access can be had tothe opening 13 in the tank.

The chimney holdin collar 17 carried by the burner is provide withspring fingers 18 and 19, each having inward offsets so as to formshoulders 20 for engagement with the shoulder 21 formed on the chimneybase 22. When the chimney is inserted the fingers 18 and 19 springapartto allow the shoulder 21 to engage beneath the shoulders 20 therebyholding the chimney securely in position within the collar. The body 9and the burner and chimney may be readily removed from the neck 5, aswill be understood. It will be noticed that when the body is applied tothe tank, as shown in Fig. 2, a considerable airspace is formed betweenthe top of the tank and the sides and top of the body which isindependent of the tank and thereby receives no oil. The upper half ofthe structure is. thereby made very light so that when the lamp istilted, the weight will immediately act to return the lamp to uprightposition, the oil in the tank assisting in this action.

Having thus described the invention, what I claim as new is 1. In alamp, a tank, a neck projecting vertically therefrom, a shell-like bodysecured upon the neck and having its edges engaging the tank and itssides forming a continuation of the sides of the tank, and a burnerremovably secured to the body.

2. In a lamp, a tank, a neck projecting vertically therefrom, aninverted cup shape body removably secured to the neck and having itsedges contacting with the tank, said body being separated from the tankby an air space, and a burner removably secured to the body.

In testimony whereof I affix my signature in presence of two witnesses.

LOWELL ARTHUR BARTLETT.

lVitnesses:

CHARLES W. BARTLETT, OELARLES H. DOLE.

five cents each, by addressing the Commissioner of Patents, Washington,D. G.

